Bubeníková, Tatiana, 1975- Characterization of macromolecular traits of lignin from heat treated spruce wood by size exclusion chomatography / Tatiana Bubeníková ...[et al.]. -- Grafy, tab. -- Lit. - Lignin composition, functionality, purity, molecular weight distribution and degree of cross - linking are of great interest because of their impact on physicochemical properties and influence on its potential applications . In this study, dioxane lignin from spruc e wood thermally treated at various temperatures (100, 150, 200, 220, 240, 260, 280 and 300 °C) and duration (1, 3 and 5 hours) was investigated by size exclusion chromatography (SEC) using 0.005 M LiBr in DMF on two POLAR - M columns . With increasing temperature and duration of treatment the degradation and condensation reactions take place in lignin. At the temperatures till 200 - 240 °C , the degradation and condensation reactions take place simultaneously, but the lignin macromolecule condensation is predominant, and the molecular weights increase. At the temperatures over 240 °C , the decomposition of high molecular fractions of lignin takes place. U nder mild conditions of thermal treatment , the extraction of lignin from wood increased , and with increa sed severity of treatment it decreased rapidly .

In Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Zvolen : Technická univerzita vo Zvolene, 2018. -- ISSN 1336-3824. -- Vol. 60, no. 2 (2018), s. 33-42

I. Luptáková, Jana, 1984-
II. Kačíková, Danica, 1964-
III. Kačík, František, 1958-
IV. Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Vol. 60, no. 2 (2018), s. 33-42

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